Its nature in us as human beings to support and give back where we came back from, because look at it from this angle, they’ve taken care of you since you were young up to now taking you to school. So literally its socially acceptable or socially moral to give back to mum and dad,” he explained.
请问：since you were young up to now taking you to school 这句话结构如何理解，感觉怪怪的。Since A to B，A和B的结构又不类似，如此可以么？
这句话不是你说的A to B结构，而是正常的since引导的时间状语从句，具体如下：
1.they’ve taken care of you是主句，since you were young是时间状语从句，since表示“自从……”，主句用目前完成时，从句用通常目前时；
2.up to now 是一个短语，“一直到目前”，也做主句的时间状语；
3.taking you to school作随着状语；
4.这句话的大致意思是：他们从你小时候起一直到目前，就一直照顾着你，送你去学校。
期望回答能助你解决疑惑！
